Equipment Types
| Equipment | Description | Equipment Type Abbrev. |
|---|---|---|
| Air Handling Equipment | ||
| AHU |
Air Handling Unit. Large, central air conditioning unit may heat, cool, humidify, dehumidify air and distribute it through ductwork to other equipment or spaces within the building. |
AHU |
| DOAS |
Dedicated Outside Air System. An AHU that uses 100% Outside Air and exhausts all return air. |
DOAS |
| MAU |
Makeup Air Unit. A DOAS that does not deal with return air. |
MAU |
| CRAH |
Computer Room Air Handler. AHU specially designed to have fine control over temperature and humidity. |
CRAH |
| FCU |
Fan Coil Unit. Simpler version of an AHU; FCUs typically contain only heating coils, cooling coils, a supply fan and a damper and are located in their target zone. |
FCU |
| Packaged Air Handling Equipment | Air Conditioning Equipment | ||
| Rooftop Unit (RTU) |
An RTU includes all the components of an air conditioning system in one (typically) weatherised unit. |
RTU |
| Air Conditioning Unit (ACU) |
Any indoor packaged unit or dedicated split systems; refrigerant based systems that house an internal compressor; typically in-zone. |
ACU |
| CRAC |
Computer Room Air Conditioner. ACU specially designed to have fine control over temperature and humidity. |
CRAC |
| Water Packaged Unit (WPU) |
Similar to a FCU, with the addition of a water-cooled compressor. May or may not be a heatpump. (If heatpump then option to model as Heatpump equip if preferred. WPU is common terminology and has been included as such). |
WPU |
| Heatpump |
In-zone packages or tightly coupled split units with internal reverse cycle compressor. Typically identified by the presence of a reversing valve. |
HP |
| Outdoor Units | ||
| Outdoor Unit (CU) |
Outside condenser unit that feeds dx equipment. |
CU |
| Variable Refrigerant Flow (VRF) |
Outside condenser unit that can vary refrigerant volume to meet demand from multiple dx equipment (i.e. multiple FCUs). |
VRF |
| Air Terminal Equipment | ||
| VAV |
Variable air volume terminal unit |
VAV |
| Induction Unit |
Similar to an enclosed active Chilled beam with a built in condensation tray. |
InductionUnit |
| Radiant Equipment | ||
| Chilled Beam |
Conditions a space using an exposed heat exchanger integrated into the ceiling |
ChilledBeam |
| Radiant Floor |
Heats a space using pipes or cables embedded beneath floor |
RadiantFloor |
| Radiator |
Heats a space using exposed pipes or coils |
Radiator |
| Meters | ||
| Electricity Meter |
Electricity meter |
ElecMeter |
| Flow Meter |
Meter to measure flow rate and total volume of fluid |
FlowMeter |
| Thermal Meter |
Meter to measure energy transfer via fluid |
ThermalMeter |
| Plant | ||
| Boiler |
Equipment to generate hot water or steam for heating |
Boiler |
| Chiller |
Equipment to remove heat from a liquid |
Chiller |
| Cooling Tower |
Equipment to transfer waste heat into the atmosphere |
CT |
| Heat Exchanger (HEX) |
Equipment to transfer heat between two working fluids |
HEX |
| Chilled Water Plant (CHWS) |
Container object to group together equipment and hold common points |
CHWS |
| Condenser Water Plant (CDWS) |
Container object to group together equipment and hold common pointse |
CDWS |
| Heating Hot Water Plant (HHWS) |
Container object to group together equipment and hold common points |
HHWS |
| Other | ||
| Fan |
Equipment to move air |
Fan |
| Pump |
Equipment to move liquids |
Pump |
| Coil |
Heat exchanger used to heat or cool air |
Coil |
| Cooling Coil |
Coil used to cool air |
CoolingCoil |
| Heating Coil |
Coil used to heat air |
HeatingCoil |
| Zone Sensor |
Any independent sensor or sensor module located in the building. |
ZoneSensor |
| Zone Controller |
Supervisory control and monitoring controller. |
ZoneController |
| VFD |
Motor with variable frequency drive. |
VFD |
| Weather Station |
On-site weather station points |
WeatherStation |
Definitions
Air Handling Unit
Large, central air conditioning unit may heat, cool, humidify, dehumidify air and distribute it through ductwork to other equipment or spaces within the building. AHUs can be customisable (and modular) and can contain: Pre-heat coils, heating coils, cooling coils, multiple fans, multiple dampers, multiple filters, heat recovery systems, and outside air connections.
Can be either HHW/CHW or Refrigerant based. There is no compressor
Dedicated Outdoor Air System (DOAS)
Simply an AHU that uses 100% Outside Air and exhausts all Return Air. If this unit does not have hardware to handle Return Air, then it is a Make Up Air (MAU) unit.
Make-up Air Unit (MAU)
A DOAS that does not deal with return air. This unit simply takes in 100% outside air and conditions it.
Computer Room Air Handler (CRAH)
AHU specially designed to have fine control over temperature and humidity.
Fan Coil Unit (FCU)
Simpler version of an AHU; FCUs typically contain only heating coils, cooling coils, a supply fan and a damper. FCUs are located in the target space/zone and can distribute air directly, or through ductwork to diffusers. FCUs may have Outside Air supplied to them, but typically recirculate air from within the zone.
Can be either HHW/CHW or Refrigerant based. There is no compressor
Rooftop Unit (RTU)
Equipment includes all the components of an air conditioning and heating system in one box. Unit contains dxCoil, supply fan, dampers, outside air supply, and a compressor, evaporator, condenser, and condenser fan. These units are air cooled.
May be heatpump or cooling only.
Air Conditioning Unit (ACU)
Any indoor packaged unit or dedicated split systems. Refrigerant based systems that house an internal compressor. Can be air sourced (reject heat to air), water sourced (reject heat to condenser water), or ground sourced (reject heat to ground)(similar to water source with water circulated through ground heat exchanger loop)
May be heatpump or cooling only.
Computer Room Air Conditioner
ACU specially designed to have fine control over temperature and humidity
Heatpump
In-zone packages or tightly coupled split units with internal reverse cycle compressor. Typically identified by the presence of a reversing valve. (If a indoor pac is cooling only please use the WPU equipment type).
Water Packaged Unit (WPU)
Similar to a FCU, with the addition of a water-source heat pump built-in to the unit. WPUs contain a dxCoil, damper, fan, and a compressor and condenser water pipe work. WPUs are located in the target space/zone and can distribute air directly, or through ductwork to diffusers
May be heatpump or cooling only.
http://www.dunnair.com.au/au/assets/Uploads/2019-Dunnair-Water-Cooled.pdf
Outdoor Unit (Condensing Unit (CU))
Outside condenser unit that feeds dx equipment. May be heatpump or cooling only. Constant volume, may have an inverter to manage compressor speed to control refrigerant temperature.
https://aircon.panasonic.com/business/lineup/pac/outdoor.html
Variable Refrigerant Flow (VRF)
Outside condenser unit that can vary refrigerant volume to meet demand from multiple dx equipment (i.e. multiple FCUs).
May be heatpump or cooling only.
VAV
DiagramsA terminal unit that controls the delivery of air from another source into a zone. VAVs may also have their own fans and heating elements.
Chilled Beam
Unit consisting of chilled water coils exposed to the zone air. May have air from air handling equip blow over it (active) or not (passive).
Induction Unit
Active Chilled beam with a built in condensation tray. This allows an induction unit to sensibly and latently cool. Closely resembles a VAV
http://nuclimate.com/products/induction-chilled-beams/
https://ebaircontrol.com/blog/introduction-induction-and-chilled-beams-system
Zone Sensor
Any independent sensor or sensor module located in the building. Typically covers carpark CO2 sensors and additional zone temperature, humidity, IAQ sensors.
Zone Controller
Supervisory control and monitoring controller. Covers HVAC Zones, Floor Controllers, Building Controllers, etc.